1. Activated hopping transport in anisotropic systems at low temperatures.
- Author
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Ihnatsenka, S.
- Subjects
- *
HOPPING conduction , *ANISOTROPY , *LOW temperatures - Abstract
Numerical calculations of anisotropic hopping transport based on the resistor network model are presented. Conductivity is shown to follow the stretched exponential dependence on temperature with exponents increasing from ¼ to 1 as the wave functions become anisotropic and their localization length in the direction of charge transport decreases. For sufficiently strong anisotropy, this results in nearest-neighbor hopping at low temperatures due to the formation of a single conduction path, which adjusts in the planes where the wave functions overlap strongly. In the perpendicular direction, charge transport follows variable-range hopping, a behavior that agrees with experimental data on organic semiconductors. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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